diff options
Diffstat (limited to 'src/cmd/venti/srv/verifyarena.c')
-rw-r--r-- | src/cmd/venti/srv/verifyarena.c | 220 |
1 files changed, 177 insertions, 43 deletions
diff --git a/src/cmd/venti/srv/verifyarena.c b/src/cmd/venti/srv/verifyarena.c index 5236c093..2cdb7ba0 100644 --- a/src/cmd/venti/srv/verifyarena.c +++ b/src/cmd/venti/srv/verifyarena.c @@ -3,65 +3,102 @@ #include "fns.h" static int verbose; +static int fd; +static uchar *data; +static int blocksize; +static int sleepms; void usage(void) { - fprint(2, "usage: verifyarena [-v]\n"); + fprint(2, "usage: verifyarena [-b blocksize] [-s ms] [-v] [arenapart [name...]]\n"); threadexitsall(0); } -static void +static int +preadblock(uchar *buf, int n, vlong off) +{ + int nr, m; + + for(nr = 0; nr < n; nr += m){ + m = n - nr; + m = pread(fd, &buf[nr], m, off+nr); + if(m <= 0){ + if(m == 0) + werrstr("early eof"); + return -1; + } + } + return 0; +} + +static int readblock(uchar *buf, int n) { int nr, m; for(nr = 0; nr < n; nr += m){ m = n - nr; - m = read(0, &buf[nr], m); - if(m <= 0) - sysfatal("can't read arena from standard input: %r"); + m = read(fd, &buf[nr], m); + if(m <= 0){ + if(m == 0) + werrstr("early eof"); + return -1; + } } + return 0; } static void -verifyarena(void) +verifyarena(char *name, vlong len) { Arena arena; ArenaHead head; - ZBlock *b; DigestState s; u64int n, e; u32int bs; u8int score[VtScoreSize]; - fprint(2, "verify arena from standard input\n"); + fprint(2, "verify %s\n", name); memset(&arena, 0, sizeof arena); memset(&s, 0, sizeof s); /* - * read the little bit, which will included the header + * read a little bit, which will include the header */ - bs = MaxIoSize; - b = alloczblock(bs, 0, 0); - readblock(b->data, HeadSize); - sha1(b->data, HeadSize, nil, &s); - if(unpackarenahead(&head, b->data) < 0) - sysfatal("corrupted arena header: %r"); + if(readblock(data, HeadSize) < 0){ + fprint(2, "%s: reading header: %r\n", name); + return; + } + sha1(data, HeadSize, nil, &s); + if(unpackarenahead(&head, data) < 0){ + fprint(2, "%s: corrupt arena header: %r\n", name); + return; + } if(head.version != ArenaVersion4 && head.version != ArenaVersion5) - fprint(2, "warning: unknown arena version %d\n", head.version); + fprint(2, "%s: warning: unknown arena version %d\n", name, head.version); + if(len != 0 && len != head.size) + fprint(2, "%s: warning: unexpected length %lld != %lld\n", name, head.size, len); + if(strcmp(name, "<stdin>") != 0 && strcmp(head.name, name) != 0) + fprint(2, "%s: warning: unexpected name %s\n", name, head.name); /* * now we know how much to read * read everything but the last block, which is special */ e = head.size - head.blocksize; + bs = blocksize; for(n = HeadSize; n < e; n += bs){ if(n + bs > e) bs = e - n; - readblock(b->data, bs); - sha1(b->data, bs, nil, &s); + if(readblock(data, bs) < 0){ + fprint(2, "%s: read data: %r\n", name); + return; + } + sha1(data, bs, nil, &s); + if(sleepms) + sleep(sleepms); } /* @@ -69,8 +106,11 @@ verifyarena(void) * the sum is calculated assuming the slot for the sum is zero. */ bs = head.blocksize; - readblock(b->data, bs); - sha1(b->data, bs-VtScoreSize, nil, &s); + if(readblock(data, bs) < 0){ + fprint(2, "%s: read last block: %r\n", name); + return; + } + sha1(data, bs-VtScoreSize, nil, &s); sha1(zeroscore, VtScoreSize, nil, &s); sha1(nil, 0, score, &s); @@ -78,37 +118,73 @@ verifyarena(void) * validity check on the trailer */ arena.blocksize = head.blocksize; - if(unpackarena(&arena, b->data) < 0) - sysfatal("corrupted arena trailer: %r"); - scorecp(arena.score, &b->data[arena.blocksize - VtScoreSize]); - - if(namecmp(arena.name, head.name) != 0) - sysfatal("arena header and trailer names clash: %s vs. %s\n", head.name, arena.name); - if(arena.version != head.version) - sysfatal("arena header and trailer versions clash: %d vs. %d\n", head.version, arena.version); + if(unpackarena(&arena, data) < 0){ + fprint(2, "%s: corrupt arena trailer: %r\n", name); + return; + } + scorecp(arena.score, &data[arena.blocksize - VtScoreSize]); + + if(namecmp(arena.name, head.name) != 0){ + fprint(2, "%s: wrong name in trailer: %s vs. %s\n", + name, head.name, arena.name); + return; + } + if(arena.version != head.version){ + fprint(2, "%s: wrong version in trailer: %d vs. %d\n", + name, head.version, arena.version); + return; + } arena.size = head.size - 2 * head.blocksize; /* * check for no checksum or the same */ - if(scorecmp(score, arena.score) != 0){ - if(scorecmp(zeroscore, arena.score) != 0) - fprint(2, "warning: mismatched checksums for arena=%s, found=%V calculated=%V", - arena.name, arena.score, score); - scorecp(arena.score, score); - }else - fprint(2, "matched score\n"); - + if(scorecmp(score, arena.score) == 0) + fprint(2, "%s: verified score\n", name); + else if(scorecmp(zeroscore, arena.score) == 0) + fprint(2, "%s: unsealed\n", name); + else{ + fprint(2, "%s: mismatch checksum - found=%V calculated=%V\n", + name, arena.score, score); + return; + } printarena(2, &arena); } +static int +shouldcheck(char *name, char **s, int n) +{ + int i; + + if(n == 0) + return 1; + + for(i=0; i<n; i++){ + if(s[i] && strcmp(name, s[i]) == 0){ + s[i] = nil; + return 1; + } + } + return 0; +} + void threadmain(int argc, char *argv[]) { + int i, nline; + char *p, *q, *table, *f[10], line[256]; + vlong start, stop; + ArenaPart ap; + ventifmtinstall(); - statsinit(); - + blocksize = MaxIoSize; ARGBEGIN{ + case 'b': + blocksize = unittoull(EARGF(usage())); + break; + case 's': + sleepms = atoi(EARGF(usage())); + break; case 'v': verbose++; break; @@ -117,11 +193,69 @@ threadmain(int argc, char *argv[]) break; }ARGEND - readonly = 1; + data = vtmalloc(blocksize); + if(argc == 0){ + fd = 0; + verifyarena("<stdin>", 0); + threadexitsall(nil); + } + + if((fd = open(argv[0], OREAD)) < 0) + sysfatal("open %s: %r", argv[0]); - if(argc != 0) - usage(); + if(preadblock(data, 8192, PartBlank) < 0) + sysfatal("read arena part header: %r"); + if(unpackarenapart(&ap, data) < 0) + sysfatal("corrupted arena part header: %r"); + fprint(2, "# arena part version=%d blocksize=%d arenabase=%d\n", + ap.version, ap.blocksize, ap.arenabase); + ap.tabbase = (PartBlank+HeadSize+ap.blocksize-1)&~(ap.blocksize-1); + ap.tabsize = ap.arenabase - ap.tabbase; + table = malloc(ap.tabsize+1); + if(preadblock((uchar*)table, ap.tabsize, ap.tabbase) < 0) + sysfatal("reading arena part directory: %r"); + table[ap.tabsize] = 0; + + nline = atoi(table); + p = strchr(table, '\n'); + if(p) + p++; + for(i=0; i<nline; i++){ + if(p == nil){ + fprint(2, "warning: unexpected arena table end\n"); + break; + } + q = strchr(p, '\n'); + if(q) + *q++ = 0; + if(strlen(p) >= sizeof line){ + fprint(2, "warning: long arena table line: %s\n", p); + p = q; + continue; + } + strcpy(line, p); + memset(f, 0, sizeof f); + if(tokenize(line, f, nelem(f)) < 3){ + fprint(2, "warning: bad arena table line: %s\n", p); + p = q; + continue; + } + p = q; + if(shouldcheck(f[0], argv+1, argc-1)){ + start = strtoull(f[1], 0, 0); + stop = strtoull(f[2], 0, 0); + if(stop <= start){ + fprint(2, "%s: bad start,stop %lld,%lld\n", f[0], stop, start); + continue; + } + if(seek(fd, start, 0) < 0) + fprint(2, "%s: seek to start: %r\n", f[0]); + verifyarena(f[0], stop - start); + } + } + for(i=1; i<argc; i++) + if(argv[i] != 0) + fprint(2, "%s: did not find arena\n", argv[i]); - verifyarena(); - threadexitsall(0); + threadexitsall(nil); } |